Oil-well slip and method of actuating same



March 5, 1929. K, P, NE L 1,704,057

OIL WELL SLIP AND METHOD OF ACTUATING SAME Filed Dec, 28, 1927I/VVEATZYR. AHRL P #51455.

i/i/iw Patented Mar. 5, 1929.

STAT

FFICE.

KARL P. NEILSEN, F LONG BEACH, CALIFORNIA, ASSIGNOR OF NINETY-IFIVE PERCENT TO A. E. SEDGWICK, OF LOS ANGELES, CALIFORNIA.

OIL-WELL SLIP AND METHOD OF ACTUATINGSAME.

Application filed December 28, 1927. Serial No. 243,028.

This invention relates to slips and a method oi: actuating same, thetlips being operated to control the movement of the casing, tubing,rods, and the like in'the well. It is desirable that these slips bereleased and engaged qulckly to prevent accidents, and to facilitatethespeed of thework. My slips are operated by the driller or anotheroperator, who is stag tioned immediately adjacent the well, and actuatesthe slips by a foot treadle or the like.

An object of my invention is to provide slips of the character stated,which are released or engaged with a-Very short vertlcal movement.

Another. feature of my invention resides in the fact that it may beassembled around the casing, tubing, or the like, without having to passthe head and slips over the top of the pipe or tubing, which latteraction is cumbersome and slow.

Another feature of my invention s the positioning of the operatingspider inside of the collar, which makes the slips operate easier andover a small distance.

Uther objects, advantages, and features of invention may appear in the"accompanying drawings the subjoined detailed descriptions, and theappended claims.

In the drawing: p i

Fig. 1, is a side elevation of my slipcontrol with parts broken away toshow the interior construction.

Fig. 2, is a plan view of my control.

Fig. 3', is a plan view of one of'the slips.

Fig. &, is a side elevation of the same.

Referring more particularly to the drawing- My slip control 1, ismounted on top of the y \casing 2, and may either rest on the top of thecasing, extend around the outside of the same, or inside of the casingas desired. The slip control consists of a head 3, which isformed in tWohalves45, said halves being suitably secured together by such means asbolts, 6-6,

or the like, which bolts extend through the flanges 78,. extending fromthe halves 1-5 respectively. H

' As shown in Fig. 1, the casingrests agamst a shoulder 9, in the head3, although as previously stated the head may be mounted 1n di-fier'entways, that is, the casing may extend on the outside, or the bottom ofthe head may be flat and rest on the top of the casing.

The tubing, rods, pipes, and the like 10, ex-

tends downwardly through the head onto the casing as will be readilyunderstood. The head 3, is preferably held in position on the casing bymeans of chains 11-12, or the like, which chains are looped aroundnipples 131 l-, extending from the casing, the other end of the chainbeing secured in eyes 15-16,

' usual in this type of construction.

A split spider 18, is connected to each of the slips 17, by chain links19, or the like, and the spider has outwardly extending fingers 20,which extend through slots 21, in a ring 22; rising from the head 3, afoot treadle 23 is formed with arcuate arms which extend spiderand theslips, which makes for easier action and more efiec'tive control.

As shown in Fig. 1, as the slips 17, are lifted they are also movedoutwardly a sufiicient dis- I tance to entirely clear the pipe, tubingor the like; The slips 17, are each provided with a seat 26,approximately midway between the top and bottom thereof, and the loweredges 3 of the slips are tapered as at 27, the purpose of which will befurther. described.

A ring seat 28, is formed in the head 3,,upon which the seat 26, .isadapted to rest, both seats 26, and 27, being tapered so as to force theslips inwardly against the tubing.

' From the ringseat 28, a wall 29, rises to an offset 30, from whichofi'set the wall 30.,

rises. The purpose of thisis to accommodate the upper section of theslip when said slips are in elevated position.

As shown in Fig. 1, when the slip is elevated the tapered seat 26, restson the edge of the tapered surface 27,.which distance is relativelyshort, and about the same height as the slots 21 in the wall 22, whichmeans that a short movement of the spider 18, will move the slipsupwardly and outwardly into inoperative position.

Having described my invention, 1 claim:

1. An oil well slip comprising a split head adapted to be assembledabout a casing, a split spider positioned within the head, a p uralityof slips in the head and adapted to engage a pipe and the like, andlinks connecting the spider and slips, a treadle and lit meansconnecting said treadle and spider whereby the spideris elevated toactuate the gage a pipe and the like, and links connecting the spiderand slips, a treadle and means connecting said treadle and spider,whereby the spider is elevated to actuate the slips, a tapered ring seatin the head, a tapered seat on each of the slips adapted to. rest on thetapered ring seat, the lower edge of the slip being beveled to rest onthe ring seat when the slips are in elevated position.

t. An oil well slip comprising a split headv adapted to be assembledabout a casing, a

split spider, a ring rising from the head Within which the spider is"ositioned, fingerson the spider said ring aving slots therein throughwhich the fingers extend," slips in said head, links connecting thespider and slips, and'a foot treadle connected to said spider, a taperedring seat in the head, a tapered seat on each of the slips adapted torest on the tapered .ring seat, the lower edge of the slip being beveledto rest on the ring on the inclined rin the'ring seat in the head, saidwall being- .aboutthe same height as the distance from seat when theslips are in elevated position.

5. An oil well slip comprising a split head adapted to be assembledabout a casing, a split spider, a ring rising from the head within whichthe spider is positioned, fingers onthe spideiysaid ring having slotstherein,

through which the fingers extend, slips in said head, links connectingthe spider and slips, and 'a foot treadle connected to said.

spider, nipples extending from the casing, eyes formed on the head, andchains adapted to extend from the eyes and around the nipples, wherebythe headis held in position.

6. An oil well slip comprising a split head,

adapted to be assembled about a casing, a ring rising from the head, asplit spider mounted within the ring, fingers extending from the spider,said ring having slots therein, through which the fingers extend, atreadle connected to said fingers, whereby the spider is elevated, slipsmounted in the head, and means connecting the spidefiand slips, aninclined ring seat in the head, and an inclined seat on each of theslips adapted to rest; on the. inclined ring 'scat, a wall rising abovethe rin seat in the head, said wall being about the same height as thedistance from the inclined seat to the bottom of the slip.

7. An oil well slip comprising a split head, adapted tobe assembledabout a casing, a ring rising from the head, a split spidermounted'within the ring, fingers extending from the spider, said ringhaving slots therein, through which the fingers extend, a treadleconnected to said fingers, whereby the spider is elevated, slips mountedin the head,

and means connecting the spider and slips, an inclined ring seat in thehead, and an inclined seat on each of the slips adapted to rest 0 seat,a wall rising above the inclined seat to the bottom of'the slip, atapered lower edg .on the slip adapted to rest on'the ringjseatin theelevated position of the slips, and means to secure said head to thecasing.

,In testimony whereof, I aflix my signature.

' KARL P. 'NnrLsEN;

